396856387 has 8 divisors (see below), whose sum is σ = 412251840. Its totient is φ = 381575040.

The previous prime is 396856379. The next prime is 396856409. The reversal of 396856387 is 783658693.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 396856387 - 2³ = 396856379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396856307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21403 + ... + 35380.

It is an arithmetic number, because the mean of its divisors is an integer number (51531480).

Almost surely, 2^396856387 is an apocalyptic number.

396856387 is a deficient number, since it is larger than the sum of its proper divisors (15395453).

396856387 is a wasteful number, since it uses less digits than its factorization.

396856387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57053.

The product of its digits is 6531840, while the sum is 55.

The square root of 396856387 is about 19921.2546542631. The cubic root of 396856387 is about 734.8710261611.

The spelling of 396856387 in words is "three hundred ninety-six million, eight hundred fifty-six thousand, three hundred eighty-seven".